TDA7513 datasheet(16/58 Pages) STMICROELECTRONICS

16 / 58 page

TDA7513

16/58

3.5 MULTIPATH AND QUALITY DETECTORS

4.0 FUNCTIONAL DESCRIPTION

4.1 FM Section

Mixer1, AGC and 1st IF

Mixer1 is a wide dynamic range stage with low noise and large input signal performance. The mixer1 tank

center frequency can be adjusted by software (IF1T). The AGC operates on different sensitivities and

bandwidths (FMAGC) in order to improve the input sensitivity and dynamic range (keyed AGC). The output

signals of AGC are controlled voltage and current for preamplifier and prestage P-I-N diode attenuator

(see Figure 5). Two 10.7MHz amplifiers (IFG1 - fixed gain - and IFG2 - programmable) correct the IF ce-

ramic insertion loss.

Mixer2, Limiter and Demodulator

In this 2nd mixer stage the first 10.7MHz IF is converted into the second 450kHz IF. A multi-stage limiter

generates signals for the complete integrated demodulator without external tank. MPX output DC offset

compensation is possible via software.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

fCMP

Center Frequency of Multipath-

Bandpass

Stereodecoder locked on Pilottone

kHz

GBPMP

Bandpass Gain

bits D2, D1 configuration byte = 00

bits D2, D1 configuration byte = 10

bits D2, D1 configuration byte = 01

bits D2, D1 configuration byte = 11

GRECTMP Rectifier Gain

bits D7, D6 configuration byte = 00

7.6

bits D7, D6 configuration byte = 01

4.6

bits D7, D6 configuration byte = 10

bits D7, D6 configuration byte = 11

off

ICHMP

Rectifier Charge Current

bit D5 configuration byte = 0

0.5

µA

bit D5 configuration byte = 1

µA

IDISMP

Rectifier Discharge Current

0.5

1.5

Multipath Influence Factor

Addr. 12 / Bit 5+6

0.7

0.85

1.15

Noise Influence Factor

Addr. 16 / Bit 1+2

TDA7513 bảng dữ liệu(PDF) 16 Page - STMicroelectronics

TDA7513 bảng dữ liệu(HTML) 16 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

bảng dữ liệu tải về

Link URL